Thanks everyone.
Jon, thanks I couldn't visually determine if it was a C, D, K or N. Those 4 models all look the same to me, they all seem to have the same Vindex type upper tension, the same thread take up and stitch length mechanisms.
I understand that you can also use MTX190 needles. Does anyone know if it better to buy the MTX190 needles or try to find the older ones? I need to replace the bobin tire, is it a standard size?